首页|Microstructure Characterization of Bubbles in Gassy Soil Based on the Fractal Theory

Microstructure Characterization of Bubbles in Gassy Soil Based on the Fractal Theory

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The microscopic characterization of isolated bubbles in gassy soil plays an important role in the macroscopic physical properties of sediments and is a key factor in the study of geological hazards in gas-bearing strata.Based on the box-counting method and the pore fractal features in porous media,a fractal model of bubble microstructure parameters in gassy soil under different gas con-tents and vertical load conditions is established by using an industrial X-ray CT scanning system.The results show that the fractal di-mension of bubbles in the sample is correlated with the volume fraction of bubbles,and it is also restricted by the vertical load.The three-dimensional fractal dimension of the sample is about 1 larger than the average two-dimensional fractal dimension of all the slices from the same sample.The uniform porous media fractal model is used to test the equivalent diameter,and the results show that the variation of the measured pore diameter ratio is jointly restricted by the volume fraction and the vertical load.In addition,the measured self-similarity interval of the bubble area distribution is tested by the porous media fractal capillary bundle model,and the fitting curve of measured pore area ratio in a small loading range is obtained in this paper.

gassy soilbubble microstructure parametersfractal dimensionvertical load

WU Chen、LIN Guoqing、LIU Lele、LIU Tao、LI Chengfeng、GUO Zhenqi

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Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering,Ocean University of China,Qingdao 266100,China

Key Laboratory of Gas Hydrate,Ministry of Natural Resources,Qingdao Institute of Marine Geology,Qingdao 266237,China

College of Environmental Science and Engineering,Ocean University of China,Qingdao 266100,China

Key Laboratory of Marine Environment and Ecology,Ministry of Education,Ocean University of China,Qingdao 266100,China

Qingdao National Laboratory for Marine Science and Technology,Qingdao 266237,China

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Open Research Fund Program of State Key Laboratory of Hydroscience and EngineeringNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaTaishan Scholars Program

sk lhse-2022-D-03U200621342277139tsqn202306297

2024

10.1007/s11802-024-5517-0

中国海洋大学学报(自然科学英文版)
中国海洋大学

中国海洋大学学报(自然科学英文版)

CSTPCD
影响因子：0.268
ISSN：1672-5182
年,卷(期)：2024.23(1)
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